fix ShowCancelOrFinishButton and should_show_tip

we should guide users to use right click

because the status of these buttons can be changed by mouse click

add button for cancel or finish selecting

update strings of EP16

on the left of Field Zone

For effects that can target banished cards of both players, the bg color
sequence GGWWGG may be confusing.
Current setting:
face-up: black text (by seeing)
face-down: blue text (by confirming)

update lflist.conf

add search filter OCG&TCG and Custom

clear vectors

Clearing has a higher priority since it is reversible.